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1.
Philos Trans A Math Phys Eng Sci ; 382(2273): 20230199, 2024 Jun 09.
Artículo en Inglés | MEDLINE | ID: mdl-38736332

RESUMEN

The DESTINY+(Demonstration and Experiment of Space Technology for INterplanetary voYage with Phaethon fLyby and dUst Science) Dust Analyser (DDA) is a state-of-the-art dust telescope for the in situ analysis of cosmic dust particles. As the primary scientific payload of the DESTINY+ mission, it serves the purpose of characterizing the dust environment within the Earth-Moon system, investigating interplanetary and interstellar dust populations at 1 AU from the Sun and studying the dust cloud enveloping the asteroid (3200) Phaethon. DDA features a two-axis pointing platform for increasing the accessible fraction of the sky. The instrument combines a trajectory sensor with an impact ionization time-of-flight mass spectrometer, enabling the correlation of dynamical, physical and compositional properties for individual dust grains. For each dust measurement, a set of nine signals provides the surface charge, particle size, velocity vector, as well as the atomic, molecular and isotopic composition of the dust grain. With its capabilities, DDA is a key asset in advancing our understanding of the cosmic dust populations present along the orbit of DESTINY+. In addition to providing the scientific context, we are presenting an overview of the instrument's design and functionality, showing first laboratory measurements and giving insights into the observation planning. This article is part of a theme issue 'Dust in the Solar System and beyond'.

2.
Clin Exp Nephrol ; 28(3): 217-224, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37924431

RESUMEN

BACKGROUND: Although rituximab (RTX) is recommended by kidney disease improving global outcomes as one of the standard therapies for primary membranous nephropathy (pMN), given the constraint of insurance coverage, it is not clear how the drug is used in Japan. METHODS: This cross-sectional study was conducted via a web-based survey between November and December 2021. The participants were certified nephrologists and recruited through convenience sampling. Experience with RTX for pMN was compared to experience with RTX for minimal change nephrotic syndrome (MCNS). Reasons for withholding RTX for pMN, even when it is indicated, were also investigated. Furthermore, the proportion difference in RTX experience was analyzed. RESULTS: Responses from 380 nephrologists across 278 facilities were analyzed. RTX was used for pMN by 83 (21.8%), which was less than the 181 (47.6%) who had used RTX for MCNS (ratio of proportions: 0.46). RTX use for pMN was more frequent in facilities performing 41-80 and 81 or more kidney biopsies annually (vs. none) and by physicians with experience in anti-PLA2R antibody measurement. RTX administration for pMN was covered by insurance for 56 (67.5%), was facility-paid for 10 (12.0%), and was copaid by patients for 6 (7.2%). The most common reason for withholding RTX for pMN was difficulty in ensuring financing (146, 79.3%). CONCLUSIONS: RTX use for pMN is less common than for MCNS but not infrequent. Treatment with RTX was more frequent in biopsy-intensive facilities, and it was fully paid by the facility or patient in one-fifth of cases.


Asunto(s)
Glomerulonefritis Membranosa , Nefrosis Lipoidea , Humanos , Rituximab/uso terapéutico , Glomerulonefritis Membranosa/patología , Nefrólogos , Japón , Estudios Transversales , Nefrosis Lipoidea/tratamiento farmacológico , Internet
3.
Clin Exp Nephrol ; 28(6): 531-538, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38402500

RESUMEN

BACKGROUND: International practice guidelines advocate for the use of anti-phospholipase A2 receptor (PLA2R) antibody testing to diagnose primary membranous nephropathy (pMN). This study aimed to clarify the current status of anti-PLA2R antibody testing in the diagnosis of pMN in Japan and to scrutinize the factors associated with the implementation of this antibody test. METHODS: Utilizing a web-based questionnaire for nephrologists, responses were collected from 306 facilities and 427 nephrologists between November 2021 and December 2021. Preference for anti-PLA2R antibody testing was also investigated. Factors related to the experience of quantifying anti-PLA2R antibodies were estimated by generalized estimating equations using a robust analysis of variance with clusters of facilities of affiliation. RESULTS: Of the 427 respondents, 140 (32.8%) had previous measurement experience at their current workplace and 165 (38.6%) had previous measurement experience overall. In pMN-suspected cases without contraindications to renal biopsy, 147 (34.4%) of the respondents opted to request anti-PLA2R antibody testing. The respondents' experience with anti-PLA2R antibody quantification at their current place of work was generally higher in university hospitals and increased with the annual number of kidney biopsies and the number of years since graduation. CONCLUSION: The results of this study suggest that a significant proportion of nephrologists in Japan have no experience in performing anti-PLA2R antibody assays, and that the assays may be hampered by the limited capabilities of the current workplace and the financial burden on facilities and patients.


Asunto(s)
Glomerulonefritis Membranosa , Guías de Práctica Clínica como Asunto , Pautas de la Práctica en Medicina , Receptores de Fosfolipasa A2 , Humanos , Glomerulonefritis Membranosa/diagnóstico , Glomerulonefritis Membranosa/inmunología , Glomerulonefritis Membranosa/sangre , Receptores de Fosfolipasa A2/inmunología , Japón , Pautas de la Práctica en Medicina/estadística & datos numéricos , Autoanticuerpos/sangre , Encuestas y Cuestionarios , Síndrome Nefrótico/diagnóstico , Síndrome Nefrótico/inmunología , Masculino , Pueblos del Este de Asia
4.
Clin Exp Nephrol ; 2024 Aug 22.
Artículo en Inglés | MEDLINE | ID: mdl-39168884

RESUMEN

BACKGROUND: The characteristics of patients with advanced chronic kidney disease (CKD) who are recipients of public assistance in Japan, and the adequacy of their medical care have not been reported previously. METHODS: The records of patients with CKD stage G5 who visited nine facilities in Japan from April to June 2013 were retrospectively reviewed to compare the characteristics and care of recipients of public assistance with those of non-recipients. Receiving a presentation of kidney replacement therapy (KRT) options and polypharmacy were used as indicators of suboptimal medical care. RESULTS: Of the 592 patients included in this analysis (mean age, 69.6 years; male, 59.3%), 56 (9.5%) were recipients of public assistance and 536 (90.5%) were non-recipients of public assistance. The prevalence of diabetes mellitus, unmarried status, and living alone were higher in recipients of public assistance. In multivariable logistic regression analysis, compared with non-recipients of public assistance, recipients of public assistance were less likely to receive a presentation of KRT options (adjusted odds ratio [aOR], 0.31; 95% confidence interval [CI], 0.17-0.56), and were more likely to receive ≥ 10 (aOR, 1.92; 95% CI, 1.05-3.51), and ≥ 15 (aOR, 2.78; 95% CI, 1.23-6.26) types of medication. CONCLUSIONS: Patients with advanced CKD receiving public assistance were less likely to receive a presentation of KRT options and more likely to receive ≥ 10 and ≥ 15 types of medication, suggesting that recipients of public assistance are more likely to receive suboptimal medical care.

5.
Clin Infect Dis ; 76(6): 1074-1079, 2023 03 21.
Artículo en Inglés | MEDLINE | ID: mdl-36306421

RESUMEN

BACKGROUND: Due to potentially fatal consequences of missed bacteremia, blood cultures are often overused. While there are several prediction models that can be used to identify patients who truly need blood cultures, physicians often rely on their gestalt. We evaluated the diagnostic performance of physician gestalt for bacteremia in comparison with 2 existing prediction models: Takeshima and Shapiro. METHODS: The study enrolled consecutive adult patients with suspected infection who were in the process of being admitted to the general medicine department at 2 hospitals between April 2017 and January 2019. Attending physicians provided gestalt regarding risk of bacteremia (0%-100%). Patients with a <10% risk estimated via each strategy (ie, physician gestalt or 2 existing models) were categorized as bacteremia excluded (ie, blood cultures were considered unnecessary). Strategies were compared in terms of safety (proportion of patients with bacteremia among those classified as bacteremia excluded) and efficiency (proportion of patients classified as bacteremia excluded among the total cohort). RESULTS: Among 2014 patients, 292 (14.5%) were diagnosed with bacteremia. The safety of physician gestalt and the Takeshima and Shapiro models was 3.7% (95% confidence interval [CI], 2.2% to 5.7%), 6.5% (95% CI, 5.0% to 7.9%), and 10.8% (95% CI, 9.4% to 12.3%), whereas the efficiency of each strategy was 22.4% (95% CI, 22.5% to 26.3%), 52.7% (95% CI, 50.5% to 54.9%), and 87.8% (95% CI, 86.3% to 89.2%), respectively. CONCLUSIONS: Physician gestalt was safer but less efficient than existing models. Clinical prediction models could help reduce the overuse of blood cultures.


Asunto(s)
Bacteriemia , Médicos , Adulto , Humanos , Bacteriemia/diagnóstico , Hospitalización , Cultivo de Sangre , Hospitales
6.
Clin Exp Nephrol ; 27(9): 767-775, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37310570

RESUMEN

BACKGROUND: With the publication of the "Evidence-Based Clinical Practice Guideline for Nephrotic Syndrome 2020," we examined nephrologists' adherence to the recommendations of four of its clinical questions (CQs). METHODS: This was a cross-sectional web-based survey conducted between November and December 2021. The target population comprised nephrologists certified by the Japanese Society of Nephrology who were recruited using convenience sampling. The participants answered six items regarding the four CQs about adult patients with nephrotic syndrome and their characteristics. RESULTS: In total, 434 respondents worked in at least 306 facilities, of whom 386 (88.9%) provided outpatient care for primary nephrotic syndrome. Of these patients, 179 (41.2%) answered that they would not measure anti- phospholipase A2 receptor antibody levels in cases of suspected primary membranous nephropathy (MN) in which kidney biopsy was not possible (CQ1). Regarding immunosuppressants as maintenance therapy after relapse of minimal change nephrotic syndrome (CQ2), cyclosporine was the most common choice (290 [72.5%] and 300 [75.0%] of 400 respondents after the first and second relapses, respectively). The most common treatment for steroid-resistant cases of primary focal segmental glomerulosclerosis (CQ3) was cyclosporine (323 of 387, 83.5%). For the initial treatment of primary MN with nephrotic-range proteinuria (CQ4), corticosteroid monotherapy was the most common choice (240 of 403, 59.6%), followed by corticosteroid and cyclosporine (114, 28.3%). CONCLUSION: Gaps in recommendations and practices regarding serodiagnosis and treatment of MN (i.e., CQ1 and 4) are observed, suggesting the need to address the barriers to their insurance reimbursement and the lack of evidence behind them.


Asunto(s)
Glomerulonefritis Membranosa , Glomeruloesclerosis Focal y Segmentaria , Adhesión a Directriz , Nefrosis Lipoidea , Síndrome Nefrótico , Adulto , Humanos , Corticoesteroides/uso terapéutico , Estudios Transversales , Ciclosporina , Pueblos del Este de Asia , Glomerulonefritis Membranosa/diagnóstico , Glomerulonefritis Membranosa/tratamiento farmacológico , Glomeruloesclerosis Focal y Segmentaria/tratamiento farmacológico , Internet , Nefrólogos , Nefrosis Lipoidea/diagnóstico , Nefrosis Lipoidea/tratamiento farmacológico , Síndrome Nefrótico/diagnóstico , Síndrome Nefrótico/tratamiento farmacológico , Pautas de la Práctica en Medicina , Encuestas y Cuestionarios
7.
Int J Clin Oncol ; 28(10): 1333-1342, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37418141

RESUMEN

Chronic kidney disease (CKD) is one of the most disabling disorders with significant comorbidity and mortality. Incidence and prevalence of CKD in cancer survivors are remarkably high in both adults and pediatric patients. The reasons for this high incidence/prevalence are multifold but kidney damage by cancer itself and cancer treatment (pharmacotherapy/surgery/radiation) are the main reasons. Since cancer survivors commonly have significant comorbidities, risk of cancer recurrence, limited physical function or life expectancy, special attentions should be paid when considering the treatment of CKD and its complications. Especially, shared decision-making should be considered when selecting the renal replacement therapies with as much information/facts/evidence as possible.

8.
J Appl Clin Med Phys ; 24(9): e14043, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37254641

RESUMEN

PURPOSE: To investigate the dosimetric effect of six degrees of freedom (6DoF) couch top with rotational corrections in proton therapy (PT). METHODS: The water equivalent thickness (WET) was measured using a proton beam with a 6DoF couch top and patient immobilization base plate (PIBP) placed in front of a motorized water phantom. The accuracy verification was performed with the beam axis set perpendicular to the 6DoF couch top and tilted in 10° steps from 10° to 30°. Up to 3° rotational correction may be added during the actual treatment to correct the rotational setup error on our system. The measured and calculated values using the treatment planning system were compared. Additionally, the effect of the 3° difference was evaluated using actual measurements concerning each angle on the proton beam range. RESULTS: The WET of the 6DoF couch top and PIBP were 8.5 ± 0.1 mm and 6.8 ± 0.1 mm, respectively. The calculation and the actual measurement at each angle agreed within 0.2 mm at the maximum. A maximum difference of approximately 0.6 mm was confirmed when tilted at 3° following 30° with the 6DoF couch top plus PIBP. CONCLUSIONS: The dosimetric effect of the 6DoF couch top with rotational corrections in PT differs depending on the incidence angle on the couch top, and it increased with the increased oblique angle of incidence. However, the effect on the range was as small as 0.6 mm at the maximum. The amount of rotational correction, the angle of incidence of the beam, and the effect of rotational corrections on the proton beam range may differ depending on the structure of the couch top. Therefore, sufficient prior confirmation, and subsequent periodical quality assurance management are important.


Asunto(s)
Terapia de Protones , Humanos , Posicionamiento del Paciente , Protones , Radiometría , Planificación de la Radioterapia Asistida por Computador
9.
Histochem Cell Biol ; 157(3): 347-357, 2022 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-35239019

RESUMEN

The cystine-glutamate transporter (xCT) is responsible for the transport of cystine into cells. We recently found that xCT-deficient (xCTKO) aged mice maintained a higher rate of ovulation and ovarian weight compared with wild-type (WT) mice. It has been reported that a xCT deficiency in cultured cells induces autophagy through the suppression of mTOR survival pathways. We have previously reported that starvation in neonatal mice increases the number of primordial follicles with concomitant autophagy activation. Therefore, we investigated age-related changes in follicle reserve and fertility in xCTKO mice and clarified whether the PI3K/AKT/mTOR signaling pathway contributes to this. The numbers of offspring in the xCTKO mice aged 10 and 12 months were significantly higher than those in the WT mice. The primordial follicle numbers in xCTKO neonatal mice tended to be higher than WT mice during all times evaluated. In contrast, the primary follicle number was significantly lower in the xCTKO mice at 60 h after birth. The expression of p-AKT, which promotes follicle development, was significantly lower in xCTKO mice than that in WT mice, whereas the expression ratios of LC3-II/LC3-I were significantly higher. The xCTKO mice had significantly more primordial follicles than WT mice at 2 months of age and showed a similar trend at 13-15 months of age. These results suggest that the maintenance of fertility in aged xCTKO mice can be attributed to high follicle reserve after puberty by suppression of follicle activation during the neonatal period.


Asunto(s)
Sistema de Transporte de Aminoácidos y+ , Fertilidad , Reserva Ovárica , Fosfatidilinositol 3-Quinasas , Sistema de Transporte de Aminoácidos y+/genética , Animales , Femenino , Fertilidad/genética , Ratones , Folículo Ovárico/metabolismo , Fosfatidilinositol 3-Quinasas/metabolismo , Maduración Sexual
10.
J Magn Reson Imaging ; 56(3): 824-834, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35084789

RESUMEN

BACKGROUND: The presence of medial tibial osteophytes on knee radiographs suggests cartilage wear, but may be associated with medial meniscus extrusion (MME). The joint space width of the medial compartment consists anatomically of cartilage and the medial meniscus, but which is most responsible for joint space narrowing remains unclear. Magnetic resonance imaging (MRI) reveals MME and cartilage thickness. PURPOSES: To determine which radiographic medial tibial osteophyte width correlates better with cartilage thickness or MME distance and which radiographic medial joint space width correlates better with cartilage thickness or MME distance. STUDY TYPE: Cross-sectional. POPULATION: Total of 527 subjects, 253 females and 274 males, aged 30-79 years, included in the Kanagawa Knee Study. FIELD STRENGTH/SEQUENCE: 3 T/fat-suppressed spoiled gradient echo and proton density weighted. ASSESSMENT: The medial tibial osteophyte width and "the minimum joint space width at the medial compartment" (mJSW) were measured from plain radiographs. The cartilage region was automatically extracted from MRI data using software. The medial femoral and tibial cartilage regions were each divided into nine subregions, and the average thickness of the cartilage was determined in each region and subregion. MME was manually measured by two orthopedic surgeons using MRI coronal section images. STATISTICAL TESTS: Pearson's correlation coefficient and their comparison, with P < 0.05 considered statistically significant. RESULTS: The absolute values of the correlation coefficients were 0.33 at maximum between osteophyte width and cartilage thickness and 0.76 between osteophyte width and MME; the value was significantly higher with MME than with cartilage thickness (P < 0.001). The absolute values of the correlation coefficients were 0.50 at maximum between mJSW and cartilage thickness and 0.16 between mJSW and MME; the value was significantly higher with cartilage thickness than with MME (P < 0.001). DATA CONCLUSION: The medial tibial osteophyte width strongly reflected MME and the medial joint space width moderately reflected cartilage thickness. LEVEL OF EVIDENCE: 3 TECHNICAL EFFICACY STAGE: 3.


Asunto(s)
Cartílago Articular , Osteoartritis de la Rodilla , Osteofito , Cartílago Articular/diagnóstico por imagen , Cartílago Articular/patología , Estudios Transversales , Femenino , Humanos , Articulación de la Rodilla/diagnóstico por imagen , Articulación de la Rodilla/patología , Imagen por Resonancia Magnética/métodos , Masculino , Meniscos Tibiales/diagnóstico por imagen , Osteoartritis de la Rodilla/diagnóstico por imagen , Osteoartritis de la Rodilla/patología , Osteofito/diagnóstico por imagen , Osteofito/patología , Tibia/diagnóstico por imagen , Tibia/patología
11.
Mod Rheumatol ; 32(1): 24-31, 2022 Jan 05.
Artículo en Inglés | MEDLINE | ID: mdl-33496194

RESUMEN

OBJECTIVE: To investigate clinical characteristics and time course of lymphoproliferative disorders (LPDs) in rheumatoid arthritis (RA) patients after methotrexate (MTX) discontinuation, in those who achieved spontaneous regression (SR). METHODS: We retrospectively reviewed clinical data from RA patients with LPDs obtained from eight institutions between 2000 and 2017 and compared clinical and pathological findings between SR and non-SR groups. RESULTS: Among 232 RA patients with LPDs, 216 were treated with MTX at the onset of LPD and 144 (66.7%) achieved SR after MTX discontinuation. Higher MTX doses, high titers of anti-CCP antibodies (>13.5 U/mL), and lower LDH and soluble IL-2 receptor levels were associated with SR. Lymphocyte count was decreased at LPD onset and increased at 2 weeks after MTX discontinuation in the SR group. Epstein-Barr virus-positive mucocutaneous ulcer, reactive lymphoid hyperplasia and unclassifiable B-cell lymphoma, were more frequent in the SR than in the non-SR group. In multivariable analysis, diffuse large B-cell lymphomas was an independent predictive factor for non-SR. In the patients with SR, 73.9% achieved partial or complete regression as early as 2 weeks after MTX discontinuation. CONCLUSION: SR and non-SR in RA patients with LPDs after MTX discontinuation were associated with certain clinical characteristics.


Asunto(s)
Artritis Reumatoide , Infecciones por Virus de Epstein-Barr , Trastornos Linfoproliferativos , Artritis Reumatoide/complicaciones , Artritis Reumatoide/tratamiento farmacológico , Estudios de Casos y Controles , Infecciones por Virus de Epstein-Barr/complicaciones , Infecciones por Virus de Epstein-Barr/tratamiento farmacológico , Infecciones por Virus de Epstein-Barr/patología , Herpesvirus Humano 4 , Humanos , Trastornos Linfoproliferativos/tratamiento farmacológico , Trastornos Linfoproliferativos/etiología , Metotrexato/uso terapéutico , Estudios Retrospectivos
12.
Mod Rheumatol ; 32(1): 50-58, 2022 01 05.
Artículo en Inglés | MEDLINE | ID: mdl-33336615

RESUMEN

OBJECTIVES: To clarify factors affecting 5-year survival rates and relapse rates after spontaneous regression (SR) of lymphoproliferative disorders (LPDs) in patients with rheumatoid arthritis (RA). METHODS: This retrospective longitudinal study comprised 232 patients with RA diagnosed with LPDs between January 2000 and March 2017 at eight hospitals in Japan. The Kaplan-Meier method was used to analyze survival and the Cox proportional hazard model was applied to identify predictive factors. RESULTS: Among all patients, 1-, 2- and 5-year overall survival rates were 89.5%, 86.1%, and 78.2%, respectively. Multivariable analysis revealed four 5-year survival risk factors assessed at diagnosis: age above 70 years (p = .002), deep lymphadenopathy and/or more than one extranodal lesion (p = .008), Eastern Cooperative Oncology Group/Zubrod performance status of 2-4 (p = .004), and classic Hodgkin lymphoma (CHL) histology (p = .047). Among 143 patients who achieved SR, 2- and 5-year relapse rates were 14.2% and 24.9%, respectively. CHL histology (p = .003) and serum soluble interleukin-2 receptor levels exceeding 2000 IU/L (p = .014) were associated with post-SR relapse-free survival. Blood lymphocyte counts were significantly lower at relapse than at 3-6 months prior (p < .001). CONCLUSION: Assessment of the above risk factors and routine inspection of blood lymphocyte counts could aid in the care management of LPDs in RA.


Asunto(s)
Artritis Reumatoide , Enfermedad de Hodgkin , Trastornos Linfoproliferativos , Anciano , Humanos , Estudios Longitudinales , Trastornos Linfoproliferativos/diagnóstico , Metotrexato/efectos adversos , Recurrencia Local de Neoplasia/inducido químicamente , Recurrencia Local de Neoplasia/complicaciones , Estudios Retrospectivos
13.
Mod Rheumatol ; 32(1): 41-49, 2022 01 05.
Artículo en Inglés | MEDLINE | ID: mdl-33164614

RESUMEN

OBJECTIVES: To identify the optimal treatment for rheumatoid arthritis (RA) after the regression of lymphoproliferative disorders (LPDs). METHODS: The subjects were 232 patients with RA who developed LPD between 2000 and 2017 at seven hospitals participating in the LPD-WG study. Kaplan-Meier and Cox proportional regression analyses were performed to determine the factors associated with the rate of LPD relapse and the retention of biological disease-modifying antirheumatic drugs (bDMARDs). RESULTS: Treatment for RA was resumed in 138 patients after spontaneous regression of LPD after the discontinuation of methotrexate and in 52 patients after chemotherapy for LPD (persistent-LPD). LPD relapses occurred in 23 patients. Not DMARDs use but Hodgkin's lymphoma was identified as a risk factor for LPD relapse. In 88 RA patients treated with bDMARDs [tocilizumab, 39 patients; abatacept 20 patients; tumor necrosis factor inhibitor, 29 patients], the one-year retention rate was 67.8%. The risk factors for discontinuation of bDMARDs were persistent-LPD, non-diffuse large B-cell lymphomas (non-DLBCL), and a high clinical disease activity index (CDAI). Tocilizumab showed the highest retention rate among bDMARDs, particularly in DLBCL. CONCLUSION: Although any bDMARD could be used in patients after LPD regression, effectiveness and risk for relapse should be carefully assessed for each LPD subtype.


Asunto(s)
Antirreumáticos , Artritis Reumatoide , Trastornos Linfoproliferativos , Antirreumáticos/uso terapéutico , Artritis Reumatoide/complicaciones , Artritis Reumatoide/tratamiento farmacológico , Humanos , Trastornos Linfoproliferativos/inducido químicamente , Trastornos Linfoproliferativos/etiología , Metotrexato , Recurrencia Local de Neoplasia/inducido químicamente , Recurrencia Local de Neoplasia/complicaciones , Recurrencia Local de Neoplasia/tratamiento farmacológico , Estudios Retrospectivos
14.
J Phys Ther Sci ; 34(4): 320-326, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35400837

RESUMEN

[Purpose] This study aimed to develop and validate a method for identifying factors that may cause a fall during the pre-impact fall period using wearable sensors. [Participants and Methods] The participants were 23 young people from the public data set (mean age, 23.4 years). Acceleration and angular velocity information obtained from sensors attached to the participant's waist was used to generate the pre-impact fall. The cause of the fall (slip, trip, fainting, get up, sit down) was then classified with and without the addition of activity of daily living data using three different support vector machine. In addition, we investigated the influence of lead time (0-2.0s) on accuracy. [Results] The quadratic and cubic support vector machine identified the activity of daily living and fall patterns more accurately than the linear support vector machine, and the cubic support vector machine was better for classification, although the difference was slight. The greatest accuracy for predicting the cause of the fall (87.9%) was obtained when the cubic support vector machine was used, activity of daily living was factored into the analysis, and the lead time was 0.25 sec. [Conclusion] Support vector machine can identify the cause of the fall during the pre-impact fall period. Appropriate individualized interventions may be designed based on the most likely cause of fall as identified by this analysis method.

15.
Am J Emerg Med ; 41: 84-89, 2021 03.
Artículo en Inglés | MEDLINE | ID: mdl-33401081

RESUMEN

BACKGROUND: In most surgical textbooks, it has been stated that pain almost always precedes vomiting in patients with appendicitis. However, the usefulness of this classic history item, "pain before vomiting", has been investigated in only one study nearly 50 years ago, in which the cause of abdominal pain could not be identified in more than 40% of patients. Accordingly, our objective was to evaluate the performance of pain before vomiting for the diagnosis of acute appendicitis in patients who presented with both acute abdominal pain and vomiting. METHODS: A retrospective chart review of adult outpatients with abdominal pain and vomiting at three acute care hospitals was performed. The reference standard for appendicitis was a CT scan evaluated by two radiologists. Diagnostic performance of pain before vomiting and the value it added to the Alvarado score were evaluated. RESULTS: Among 310 patients, 24 patients were diagnosed with appendicitis. Diagnostic performance of pain before vomiting was a sensitivity of 95.8% (95% confidence interval [CI] 79.8-99.3) and a specificity of 16.6% (95% CI 12.6-21.4). When combined with the Alvarado score, it ruled out appendicitis in an additional 12% (increased from 32% to 44%) of patients without any false negatives. CONCLUSIONS: "Pain before vomiting" is useful for ruling out appendicitis in patients with abdominal pain and vomiting.


Asunto(s)
Dolor Abdominal/etiología , Dolor Agudo/etiología , Apendicitis/complicaciones , Vómitos/etiología , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Tiempo , Adulto Joven
16.
Biol Reprod ; 102(2): 399-411, 2020 02 14.
Artículo en Inglés | MEDLINE | ID: mdl-31566206

RESUMEN

The number of stockpiled primordial follicles is thought to be responsible for the fate of female fertility and reproductive lifetime. We previously reported that starvation in nonsuckling early neonatal mice increases the number of primordial follicles with concomitant autophagy activation, suggesting that autophagy may accelerate the formation of primordial follicles. In this study, we attempted to upregulate the numbers of primordial follicles by administering an autophagy inducer and evaluated the progress of primordial follicle formation and their fertility during the life of the mice. To induce autophagy, mice were intraperitoneally injected with the Tat-beclin1 D-11 peptide (0.02 mg/g body weight) at 6-54 h or 60-84 h after birth. In animals that received Tat-beclin 1 D-11 by 54 h after birth, the primordial follicle numbers were significantly increased compared with the control group at 60 h. The ratio of expressed LC3-II/LC3-I proteins was also significantly greater. The numbers of littermates from pregnant females that had been treated with Tat-beclin 1 D-11 were maintained at remarkably greater levels until 10 months old. These results were supported by an abundance of primordial follicles at even 13-15 months old.


Asunto(s)
Autofagia/fisiología , Fertilidad/fisiología , Folículo Ovárico/metabolismo , Reserva Ovárica/fisiología , Animales , Animales Recién Nacidos , Femenino , Ratones
17.
Gastric Cancer ; 22(3): 486-496, 2019 05.
Artículo en Inglés | MEDLINE | ID: mdl-30264329

RESUMEN

BACKGROUND: Epstein-Barr virus (EBV) is an oncogenic human herpesvirus involved in the development of around 10% of gastric cancers. The overexpression of PD-L1 is one of the features of EBV-associated gastric cancer (EBVaGC); however, the function of PD-L1 has not been studied in EBVaGC. METHODS: We used three EBVaGC cell lines, SNU719 cells, NCC24 cells, and YCCEL1 cells, to evaluate the PD-L1 expression and function in EBVaGC. Jurkat T-lymphocytes expressing PD-1 were co-cultured with NCC24 and YCCEL1 cells and the cell cycles were analyzed. To study the regulatory mechanism for PD-L1 expression, the 3'UTR of PD-L1 was sequenced, and the effect of inhibitors of the IFN-γ signaling pathway was evaluated. RESULTS: All of the EBVaGC cell lines expressed PD-L1, and its expression was further enhanced by stimulation with IFN-γ. In Jurkat T-cells co-cultured with IFN-γ-stimulated NCC24 and YCCEL1 cells, the number of cells in the G0/G1 phase was significantly increased. This G0/G1 arrest was partially released by administration of anti-PD-L1 antibody. We found SNPs in PD-L1 3'UTR nucleotide sequences that were located at seed regions for microRNAs. Treatment of EBVaGC cell lines with JAK2-inhibitor, PI3K-inhibitor, and mTOR inhibitor reduced the level of PD-L1 expression to the same level as cells without IFN-γ stimulation. CONCLUSIONS: EBVaGC cells expressing high levels of PD-L1 suppress T-cell proliferation, and the IFN-γ signaling pathway is involved in the expression of PD-L1.


Asunto(s)
Antígeno B7-H1/metabolismo , Infecciones por Virus de Epstein-Barr/complicaciones , Regulación Neoplásica de la Expresión Génica , Herpesvirus Humano 4/inmunología , Receptor de Muerte Celular Programada 1/metabolismo , Neoplasias Gástricas/inmunología , Linfocitos T/inmunología , Apoptosis , Antígeno B7-H1/genética , Ciclo Celular , Proliferación Celular , Inhibidores Enzimáticos/farmacología , Infecciones por Virus de Epstein-Barr/virología , Humanos , Polimorfismo de Nucleótido Simple , Receptor de Muerte Celular Programada 1/genética , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patología , Neoplasias Gástricas/virología , Linfocitos T/efectos de los fármacos , Linfocitos T/metabolismo , Células Tumorales Cultivadas
18.
Int J Qual Health Care ; 31(10): G139-G145, 2019 Dec 31.
Artículo en Inglés | MEDLINE | ID: mdl-31728518

RESUMEN

PURPOSE: To examine the update status of clinical practice guidelines (CPGs) for 24 main diseases in Japan, and to clarify the quality of and issues pertaining to the most recent versions of CPGs for each disease. DATA SOURCES: CPGs were searched in two Japanese guideline databases. STUDY SELECTION: All relevant Japanese CPGs published between January 1999 and July 2016 were selected. DATA EXTRACTION: The developer and issue date were extracted for all target CPGs. The most recent CPGs were assessed using the Appraisal of Guidelines for Research and Evaluation-II (AGREE II) instrument. RESULTS OF DATA SYNTHESIS: Among 106 target CPGs, 24 most recent CPGs were subjected to assessment using the AGREE II instrument. CPGs for 11 diseases (46%) had a mean time interval for update of ≥5 years. Among the 24 CPGs subjected to AGREE II assessment, median domain scores were 74% for "Domain 1: Scope and Purpose," 43% for "Domain 2: Stakeholder Involvement," 46% for "Domain 3: Rigor of Development," 69% for "Domain 4: Clarity of Presentation," 24% for "Domain 5: Applicability" and 27% for "Domain 6: Editorial Independence." CONCLUSIONS: The systematic assessment of CPGs for 24 major diseases in Japan revealed a trend for a delay in timing of update for many CPGs. Moreover, the 24 most recent CPGs had low domain scores for domains 2, 3, 5 and 6. In the future, concrete measures will need to be considered in order to improve the quality of CPGs.


Asunto(s)
Medicina Basada en la Evidencia , Guías como Asunto/normas , Humanos , Japón , Garantía de la Calidad de Atención de Salud/métodos
19.
Gan To Kagaku Ryoho ; 46(13): 1940-1942, 2019 Dec.
Artículo en Japonés | MEDLINE | ID: mdl-32157019

RESUMEN

A-67-year old man was diagnosed with gastric cancer and a liver tumor. Extended left hemihepatectomy combined with caudate lobectomy and distal gastrectomy with lymph node dissection were performed. Histological examination revealed synaptophysin and CD56positive tumor cells with a solid and rosette structure, which was diagnosed as endocrine carcinoma (EC). Additionally, a tubular adenocarcinoma was present in the stomach. The liver tumor presented as EC with tumor thrombus in the left portal vein. Finally, the patient was diagnosed with gastric EC(pT3[SS], pN0, P0, CY0, M1[HEP], Stage Ⅳ, R0). He received 6courses of the adjuvant chemotherapy with cisplatin(CDDP)plus irinotecan(CPT-11), and has been alive without recurrence for 21 months post-operation. Gastric EC is a rare subtype of gastric cancer. The resection of liver metastasis of gastric EC may improve patients' prognosis and QOL. CDDP-based chemotherapy is recommended, due to the regimen for small cell lung cancer.


Asunto(s)
Neoplasias Hepáticas , Neoplasias Gástricas , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Cisplatino , Gastrectomía , Humanos , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/secundario , Masculino , Recurrencia Local de Neoplasia , Ácido Oxónico , Neoplasias Gástricas/tratamiento farmacológico , Neoplasias Gástricas/patología , Tegafur
20.
J Med Virol ; 89(3): 508-517, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-27430892

RESUMEN

The present study investigated the effect of a DNA demethylating agent, decitabine, against Epstein-Barr virus-associated gastric cancer (EBVaGC). Decitabine inhibited cell growth and induced G2/M arrest and apoptosis in EBVaGC cell lines. The expression of E-cadherin was up-regulated and cell motility was significantly inhibited in the cells treated with decitabine. The promoter regions of p73 and RUNX3 were demethylated, and their expression was up-regulated by decitabine. They enhanced the transcription of p21, which induced G2/M arrest and apoptosis through down-regulation of c-Myc. Decitabine also induced the expression of BZLF1 in SNU719. Induction of EBV lytic infection was an alternative way to cause apoptosis of the host cells. This study is the first report to reveal the effectiveness of a demethylating agent in inhibiting tumor cell proliferation and up-regulation of E-cadherin in EBVaGC. J. Med. Virol. 89:508-517, 2017. © 2016 Wiley Periodicals, Inc.


Asunto(s)
Antimetabolitos Antineoplásicos/farmacología , Azacitidina/análogos & derivados , Cadherinas/biosíntesis , Proliferación Celular/efectos de los fármacos , Células Epiteliales/efectos de los fármacos , Infecciones por Virus de Epstein-Barr/complicaciones , Neoplasias Gástricas/patología , Apoptosis , Azacitidina/farmacología , Ciclo Celular/efectos de los fármacos , Puntos de Control del Ciclo Celular , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Decitabina , Células Epiteliales/fisiología , Humanos
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